Put Tcpdump on DD-Wrt Router

Hello everyone,

I would like to install "tcpdump" (with libpcap) on my Buffalo WHR54 Router, which runs DD-WRT v24sp1 mini. I already found out, that I have to install the mini-firmware in order to access JFFS (which is not in the vpn-version) and have enough space on the device left.


I tried several ways: Get the tcpdump-packet with wget, and also those two:
1. ipkg -d root install tcpdump
2. ipkg -force-depends -d root install tcpdump

But the result always is:

Downloading http://downloads.openwrt.org/whiteru...4-1_mipsel.ipk ...
Connecting to downloads.openwrt.org (195.56.146.238:80)
libpcap_0.9.4-1_mips 100% |************************************************* ************************************************** *****************| 68534 00:00:00 ETA
Done.
tar: invalid tar magic
tar: crc error
tar: short read
ipkg_install_file: ERROR unpacking control.tar.gz from /jffs/tmp/ipkg/libpcap_0.9.4-1_mipsel.ipk
ipkg_get_install: ERROR: Failed to install /jffs/tmp/ipkg/libpcap_0.9.4-1_mipsel.ipk
ipkg_get_install: I'll leave it there for you to try a manual installation


I tried "ipkg update" which seems to work (no errors), but doesn't change anything :-((

Could anybody help me, please?
Thank you very much,
Christopher